diff options
Diffstat (limited to 'arch/arm/mach-davinci/board-dm365-evm.c')
| -rw-r--r-- | arch/arm/mach-davinci/board-dm365-evm.c | 492 |
1 files changed, 492 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c new file mode 100644 index 0000000..a1d5e7d --- /dev/null +++ b/arch/arm/mach-davinci/board-dm365-evm.c @@ -0,0 +1,492 @@ +/* + * TI DaVinci DM365 EVM board support + * + * Copyright (C) 2009 Texas Instruments Incorporated + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/i2c.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/i2c/at24.h> +#include <linux/leds.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/mtd/nand.h> +#include <asm/setup.h> +#include <asm/mach-types.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <mach/mux.h> +#include <mach/hardware.h> +#include <mach/dm365.h> +#include <mach/psc.h> +#include <mach/common.h> +#include <mach/i2c.h> +#include <mach/serial.h> +#include <mach/common.h> +#include <mach/mmc.h> +#include <mach/nand.h> + + +static inline int have_imager(void) +{ + /* REVISIT when it's supported, trigger via Kconfig */ + return 0; +} + +static inline int have_tvp7002(void) +{ + /* REVISIT when it's supported, trigger via Kconfig */ + return 0; +} + + +#define DM365_ASYNC_EMIF_CONTROL_BASE 0x01d10000 +#define DM365_ASYNC_EMIF_DATA_CE0_BASE 0x02000000 +#define DM365_ASYNC_EMIF_DATA_CE1_BASE 0x04000000 + +#define DM365_EVM_PHY_MASK (0x2) +#define DM365_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */ + +/* + * A MAX-II CPLD is used for various board control functions. + */ +#define CPLD_OFFSET(a13a8,a2a1) (((a13a8) << 10) + ((a2a1) << 3)) + +#define CPLD_VERSION CPLD_OFFSET(0,0) /* r/o */ +#define CPLD_TEST CPLD_OFFSET(0,1) +#define CPLD_LEDS CPLD_OFFSET(0,2) +#define CPLD_MUX CPLD_OFFSET(0,3) +#define CPLD_SWITCH CPLD_OFFSET(1,0) /* r/o */ +#define CPLD_POWER CPLD_OFFSET(1,1) +#define CPLD_VIDEO CPLD_OFFSET(1,2) +#define CPLD_CARDSTAT CPLD_OFFSET(1,3) /* r/o */ + +#define CPLD_DILC_OUT CPLD_OFFSET(2,0) +#define CPLD_DILC_IN CPLD_OFFSET(2,1) /* r/o */ + +#define CPLD_IMG_DIR0 CPLD_OFFSET(2,2) +#define CPLD_IMG_MUX0 CPLD_OFFSET(2,3) +#define CPLD_IMG_MUX1 CPLD_OFFSET(3,0) +#define CPLD_IMG_DIR1 CPLD_OFFSET(3,1) +#define CPLD_IMG_MUX2 CPLD_OFFSET(3,2) +#define CPLD_IMG_MUX3 CPLD_OFFSET(3,3) +#define CPLD_IMG_DIR2 CPLD_OFFSET(4,0) +#define CPLD_IMG_MUX4 CPLD_OFFSET(4,1) +#define CPLD_IMG_MUX5 CPLD_OFFSET(4,2) + +#define CPLD_RESETS CPLD_OFFSET(4,3) + +#define CPLD_CCD_DIR1 CPLD_OFFSET(0x3e,0) +#define CPLD_CCD_IO1 CPLD_OFFSET(0x3e,1) +#define CPLD_CCD_DIR2 CPLD_OFFSET(0x3e,2) +#define CPLD_CCD_IO2 CPLD_OFFSET(0x3e,3) +#define CPLD_CCD_DIR3 CPLD_OFFSET(0x3f,0) +#define CPLD_CCD_IO3 CPLD_OFFSET(0x3f,1) + +static void __iomem *cpld; + + +/* NOTE: this is geared for the standard config, with a socketed + * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you + * swap chips with a different block size, partitioning will + * need to be changed. This NAND chip MT29F16G08FAA is the default + * NAND shipped with the Spectrum Digital DM365 EVM + */ +#define NAND_BLOCK_SIZE SZ_128K + +static struct mtd_partition davinci_nand_partitions[] = { + { + /* UBL (a few copies) plus U-Boot */ + .name = "bootloader", + .offset = 0, + .size = 28 * NAND_BLOCK_SIZE, + .mask_flags = MTD_WRITEABLE, /* force read-only */ + }, { + /* U-Boot environment */ + .name = "params", + .offset = MTDPART_OFS_APPEND, + .size = 2 * NAND_BLOCK_SIZE, + .mask_flags = 0, + }, { + .name = "kernel", + .offset = MTDPART_OFS_APPEND, + .size = SZ_4M, + .mask_flags = 0, + }, { + .name = "filesystem1", + .offset = MTDPART_OFS_APPEND, + .size = SZ_512M, + .mask_flags = 0, + }, { + .name = "filesystem2", + .offset = MTDPART_OFS_APPEND, + .size = MTDPART_SIZ_FULL, + .mask_flags = 0, + } + /* two blocks with bad block table (and mirror) at the end */ +}; + +static struct davinci_nand_pdata davinci_nand_data = { + .mask_chipsel = BIT(14), + .parts = davinci_nand_partitions, + .nr_parts = ARRAY_SIZE(davinci_nand_partitions), + .ecc_mode = NAND_ECC_HW, + .options = NAND_USE_FLASH_BBT, +}; + +static struct resource davinci_nand_resources[] = { + { + .start = DM365_ASYNC_EMIF_DATA_CE0_BASE, + .end = DM365_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1, + .flags = IORESOURCE_MEM, + }, { + .start = DM365_ASYNC_EMIF_CONTROL_BASE, + .end = DM365_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, +}; + +static struct platform_device davinci_nand_device = { + .name = "davinci_nand", + .id = 0, + .num_resources = ARRAY_SIZE(davinci_nand_resources), + .resource = davinci_nand_resources, + .dev = { + .platform_data = &davinci_nand_data, + }, +}; + +static struct at24_platform_data eeprom_info = { + .byte_len = (256*1024) / 8, + .page_size = 64, + .flags = AT24_FLAG_ADDR16, + .setup = davinci_get_mac_addr, + .context = (void *)0x7f00, +}; + +static struct i2c_board_info i2c_info[] = { + { + I2C_BOARD_INFO("24c256", 0x50), + .platform_data = &eeprom_info, + }, +}; + +static struct davinci_i2c_platform_data i2c_pdata = { + .bus_freq = 400 /* kHz */, + .bus_delay = 0 /* usec */, +}; + +static int cpld_mmc_get_cd(int module) +{ + if (!cpld) + return -ENXIO; + + /* low == card present */ + return !(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 4 : 0)); +} + +static int cpld_mmc_get_ro(int module) +{ + if (!cpld) + return -ENXIO; + + /* high == card's write protect switch active */ + return !!(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 5 : 1)); +} + +static struct davinci_mmc_config dm365evm_mmc_config = { + .get_cd = cpld_mmc_get_cd, + .get_ro = cpld_mmc_get_ro, + .wires = 4, + .max_freq = 50000000, + .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED, + .version = MMC_CTLR_VERSION_2, +}; + +static void dm365evm_emac_configure(void) +{ + /* + * EMAC pins are multiplexed with GPIO and UART + * Further details are available at the DM365 ARM + * Subsystem Users Guide(sprufg5.pdf) pages 125 - 127 + */ + davinci_cfg_reg(DM365_EMAC_TX_EN); + davinci_cfg_reg(DM365_EMAC_TX_CLK); + davinci_cfg_reg(DM365_EMAC_COL); + davinci_cfg_reg(DM365_EMAC_TXD3); + davinci_cfg_reg(DM365_EMAC_TXD2); + davinci_cfg_reg(DM365_EMAC_TXD1); + davinci_cfg_reg(DM365_EMAC_TXD0); + davinci_cfg_reg(DM365_EMAC_RXD3); + davinci_cfg_reg(DM365_EMAC_RXD2); + davinci_cfg_reg(DM365_EMAC_RXD1); + davinci_cfg_reg(DM365_EMAC_RXD0); + davinci_cfg_reg(DM365_EMAC_RX_CLK); + davinci_cfg_reg(DM365_EMAC_RX_DV); + davinci_cfg_reg(DM365_EMAC_RX_ER); + davinci_cfg_reg(DM365_EMAC_CRS); + davinci_cfg_reg(DM365_EMAC_MDIO); + davinci_cfg_reg(DM365_EMAC_MDCLK); + + /* + * EMAC interrupts are multiplexed with GPIO interrupts + * Details are available at the DM365 ARM + * Subsystem Users Guide(sprufg5.pdf) pages 133 - 134 + */ + davinci_cfg_reg(DM365_INT_EMAC_RXTHRESH); + davinci_cfg_reg(DM365_INT_EMAC_RXPULSE); + davinci_cfg_reg(DM365_INT_EMAC_TXPULSE); + davinci_cfg_reg(DM365_INT_EMAC_MISCPULSE); +} + +static void dm365evm_mmc_configure(void) +{ + /* + * MMC/SD pins are multiplexed with GPIO and EMIF + * Further details are available at the DM365 ARM + * Subsystem Users Guide(sprufg5.pdf) pages 118, 128 - 131 + */ + davinci_cfg_reg(DM365_SD1_CLK); + davinci_cfg_reg(DM365_SD1_CMD); + davinci_cfg_reg(DM365_SD1_DATA3); + davinci_cfg_reg(DM365_SD1_DATA2); + davinci_cfg_reg(DM365_SD1_DATA1); + davinci_cfg_reg(DM365_SD1_DATA0); +} + +static void __init evm_init_i2c(void) +{ + davinci_init_i2c(&i2c_pdata); + i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info)); +} + +static struct platform_device *dm365_evm_nand_devices[] __initdata = { + &davinci_nand_device, +}; + +static inline int have_leds(void) +{ +#ifdef CONFIG_LEDS_CLASS + return 1; +#else + return 0; +#endif +} + +struct cpld_led { + struct led_classdev cdev; + u8 mask; +}; + +static const struct { + const char *name; + const char *trigger; +} cpld_leds[] = { + { "dm365evm::ds2", }, + { "dm365evm::ds3", }, + { "dm365evm::ds4", }, + { "dm365evm::ds5", }, + { "dm365evm::ds6", "nand-disk", }, + { "dm365evm::ds7", "mmc1", }, + { "dm365evm::ds8", "mmc0", }, + { "dm365evm::ds9", "heartbeat", }, +}; + +static void cpld_led_set(struct led_classdev *cdev, enum led_brightness b) +{ + struct cpld_led *led = container_of(cdev, struct cpld_led, cdev); + u8 reg = __raw_readb(cpld + CPLD_LEDS); + + if (b != LED_OFF) + reg &= ~led->mask; + else + reg |= led->mask; + __raw_writeb(reg, cpld + CPLD_LEDS); +} + +static enum led_brightness cpld_led_get(struct led_classdev *cdev) +{ + struct cpld_led *led = container_of(cdev, struct cpld_led, cdev); + u8 reg = __raw_readb(cpld + CPLD_LEDS); + + return (reg & led->mask) ? LED_OFF : LED_FULL; +} + +static int __init cpld_leds_init(void) +{ + int i; + + if (!have_leds() || !cpld) + return 0; + + /* setup LEDs */ + __raw_writeb(0xff, cpld + CPLD_LEDS); + for (i = 0; i < ARRAY_SIZE(cpld_leds); i++) { + struct cpld_led *led; + + led = kzalloc(sizeof(*led), GFP_KERNEL); + if (!led) + break; + + led->cdev.name = cpld_leds[i].name; + led->cdev.brightness_set = cpld_led_set; + led->cdev.brightness_get = cpld_led_get; + led->cdev.default_trigger = cpld_leds[i].trigger; + led->mask = BIT(i); + + if (led_classdev_register(NULL, &led->cdev) < 0) { + kfree(led); + break; + } + } + + return 0; +} +/* run after subsys_initcall() for LEDs */ +fs_initcall(cpld_leds_init); + + +static void __init evm_init_cpld(void) +{ + u8 mux, resets; + const char *label; + struct clk *aemif_clk; + + /* Make sure we can configure the CPLD through CS1. Then + * leave it on for later access to MMC and LED registers. + */ + aemif_clk = clk_get(NULL, "aemif"); + if (IS_ERR(aemif_clk)) + return; + clk_enable(aemif_clk); + + if (request_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE, + "cpld") == NULL) + goto fail; + cpld = ioremap(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE); + if (!cpld) { + release_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, + SECTION_SIZE); +fail: + pr_err("ERROR: can't map CPLD\n"); + clk_disable(aemif_clk); + return; + } + + /* External muxing for some signals */ + mux = 0; + + /* Read SW5 to set up NAND + keypad _or_ OneNAND (sync read). + * NOTE: SW4 bus width setting must match! + */ + if ((__raw_readb(cpld + CPLD_SWITCH) & BIT(5)) == 0) { + /* external keypad mux */ + mux |= BIT(7); + + platform_add_devices(dm365_evm_nand_devices, + ARRAY_SIZE(dm365_evm_nand_devices)); + } else { + /* no OneNAND support yet */ + } + + /* Leave external chips in reset when unused. */ + resets = BIT(3) | BIT(2) | BIT(1) | BIT(0); + + /* Static video input config with SN74CBT16214 1-of-3 mux: + * - port b1 == tvp7002 (mux lowbits == 1 or 6) + * - port b2 == imager (mux lowbits == 2 or 7) + * - port b3 == tvp5146 (mux lowbits == 5) + * + * Runtime switching could work too, with limitations. + */ + if (have_imager()) { + label = "HD imager"; + mux |= 1; + + /* externally mux MMC1/ENET/AIC33 to imager */ + mux |= BIT(6) | BIT(5) | BIT(3); + } else { + struct davinci_soc_info *soc_info = &davinci_soc_info; + + /* we can use MMC1 ... */ + dm365evm_mmc_configure(); + davinci_setup_mmc(1, &dm365evm_mmc_config); + + /* ... and ENET ... */ + dm365evm_emac_configure(); + soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK; + soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY; + resets &= ~BIT(3); + + /* ... and AIC33 */ + resets &= ~BIT(1); + + if (have_tvp7002()) { + mux |= 2; + resets &= ~BIT(2); + label = "tvp7002 HD"; + } else { + /* default to tvp5146 */ + mux |= 5; + resets &= ~BIT(0); + label = "tvp5146 SD"; + } + } + __raw_writeb(mux, cpld + CPLD_MUX); + __raw_writeb(resets, cpld + CPLD_RESETS); + pr_info("EVM: %s video input\n", label); + + /* REVISIT export switches: NTSC/PAL (SW5.6), EXTRA1 (SW5.2), etc */ +} + +static struct davinci_uart_config uart_config __initdata = { + .enabled_uarts = (1 << 0), +}; + +static void __init dm365_evm_map_io(void) +{ + dm365_init(); +} + +static __init void dm365_evm_init(void) +{ + evm_init_i2c(); + davinci_serial_init(&uart_config); + + dm365evm_emac_configure(); + dm365evm_mmc_configure(); + + davinci_setup_mmc(0, &dm365evm_mmc_config); + + /* maybe setup mmc1/etc ... _after_ mmc0 */ + evm_init_cpld(); +} + +static __init void dm365_evm_irq_init(void) +{ + davinci_irq_init(); +} + +MACHINE_START(DAVINCI_DM365_EVM, "DaVinci DM365 EVM") + .phys_io = IO_PHYS, + .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc, + .boot_params = (0x80000100), + .map_io = dm365_evm_map_io, + .init_irq = dm365_evm_irq_init, + .timer = &davinci_timer, + .init_machine = dm365_evm_init, +MACHINE_END + |
